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https://issues.apache.org/jira/browse/HADOOP-11660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14345490#comment-14345490
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Hadoop QA commented on HADOOP-11660:
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{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12702205/jira-11660.patch
against trunk revision 4228de9.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5833//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5833//console
This message is automatically generated.
> Add support for hardware crc on ARM aarch64 architecture
> --------------------------------------------------------
>
> Key: HADOOP-11660
> URL: https://issues.apache.org/jira/browse/HADOOP-11660
> Project: Hadoop Common
> Issue Type: Improvement
> Components: native
> Affects Versions: 3.0.0
> Environment: ARM aarch64 development platform
> Reporter: Edward Nevill
> Assignee: Edward Nevill
> Priority: Minor
> Labels: performance
> Fix For: 3.0.0
>
> Attachments: jira-11660.patch
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> This patch adds support for hardware crc for ARM's new 64 bit architecture
> The patch is completely conditionalized on __aarch64__
> I have only added support for the non pipelined version as I benchmarked the
> pipelined version on aarch64 and it showed no performance improvement.
> The aarch64 version supports both Castagnoli and Zlib CRCs as both of these
> are supported on ARM aarch64 hardwre.
> To benchmark this I modified the test_bulk_crc32 test to print out the time
> taken to CRC a 1MB dataset 1000 times.
> Before:
> CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55
> CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55
> After:
> CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57
> CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57
> So this represents a 5X performance improvement on raw CRC calculation.
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